What is your favourite movie featuring split personality?

Movies in this genre are my favourite. I liked "Single White Female", "Hand that Rocks the Cradle", "Kiss the Girls". And I've just seen a very good one - "Along Came a Spider". What are your favourites?

Hello annamol, well i only saw one movie when there is split personalitys. It was "Hide and seek" starring Robert Deniro, and Dakota. I will try to watch at least one of movies that you have written. Cheers and happy myLotting !

For me it is certainly Identify.I was really shocked by its unexpected ending when I watched it.And your question also remind me of another film about this mental phenomena,that is Shutter Island,but I don't think it is so good as critics said.A bit boring experience for me.(Well,just my individual opinion)

Secret Window starring Johnny Depp, it was based on a novella by Stephen King. Depps character Mort is instantly likable and you sympathise with him and then he turns out to be a nut job It is obvious early on that he has a split personality and that it is him that is harassing himself but Johnny Depp does a great job and makes the movie very watchable.